MB-9081: use right get_indexed_seqs and fix index-aware purging

As part of merging index-aware puring support API from 2.2.0 branch to
master Filipe introduced additional parameters to that call. And
somehow I've missed his message informing me about this change.

Similarly to 2.2.0 we're ignoring index-ness of spatial and dev views
and only considering just production non-spatial views.

Change-Id: I74a3aa67acf6e8a9d4963e2440c88442a4ff0f50
Reviewed-on: http://review.couchbase.org/28853
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>